input_plain.edg.xml

<?xml version="1.0" encoding="UTF-8"?>

<edges version="1.20" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://sumo.dlr.de/xsd/edges_file.xsd">
    <edge id="e" from="A" to="B" numLanes="7">
        <lane index="0" width="0.001"/>
        <lane index="1" width="3"/>
        <lane index="2" width="0.001"/>
        <lane index="3" width="3"/>
        <lane index="4" width="0.001"/>
        <lane index="5" width="3"/>
        <lane index="6" width="0.001"/>
    </edge>
</edges>